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Watch a Tesla P85D terrify passengers with "Insane Mode" — Parallax Forums

Watch a Tesla P85D terrify passengers with "Insane Mode"

Ron CzapalaRon Czapala Posts: 2,418
edited 2015-01-31 02:20 in General Discussion
https://autos.yahoo.com/blogs/motoramic/watch-a-691-hp-tesla-p85d-terrify-passengers-with--insane-mode-153611595.html

The P85D is a dual-motor Model S; one motor situated behind the front axle, the other at the rear. This makes it all-wheel-drive, and offers power to the tune of 691 hp and 686 lb.-ft. of torque. 0-60 mph occurs in just 3.2-seconds, but as with any electric car, it's the ferocity of that punch that shocks you the most.

To showcase that fact, Drag Times got their hands on a P85D and threw a few unsuspecting members of the public in the passenger seat. Their reactions justify "Insane Mode" quite nicely. (Watch the video below, but be aware, even with the help of bleeps — many, many bleeps — explicit language could not be avoided.)

As for those 707-hp Dodges, well, the Challenger Hellcat lined up for a quarter-mile sprint against a P85D recently. Let's just say it lost. Badly. Yes, the P85D is very insane indeed.

Comments

  • ercoerco Posts: 20,256
    edited 2015-01-29 12:30
    The seats are lurching backwards, contributing significantly to the shock value. That cheap gimmick can't be DOT-approved.
  • Ron CzapalaRon Czapala Posts: 2,418
    edited 2015-01-29 12:33
    erco wrote: »
    The seats are lurching backwards, contributing to the shock value. That gimmick can't be DOT-approved.

    Sure the seats lurch back - 0 to 60 in 3.2 seconds will do that!!
  • ercoerco Posts: 20,256
    edited 2015-01-29 12:34
    No, it's way more than flexing. The reclining mechanisms have been tampered with.

    But more importantly, where are the bikini-clad 20-year olds I see in all the Vine videos?
  • kwinnkwinn Posts: 8,697
    edited 2015-01-29 13:01
    erco wrote: »
    No, it's way more than flexing. The reclining mechanisms have been tampered with.

    But more importantly, where are the bikini-clad 20-year olds I see in all the Vine videos?

    Perhaps the reclining mechanism has been tampered with but I doubt it. Electric motors put out maximum torque at the start unlike IC engines that reach max torque at higher (~2000+) rpm. Add that to the power output and I can see how the seat backs would flex. Also why it blew the doors off the Dodge.
  • ercoerco Posts: 20,256
    edited 2015-01-29 13:31
    Loosening the four floor bolts holding the seat down would give the same result. Sure it's a quick car, but I cry foul on the video. Alert the media, "Unscrew-gate" is just as headline worthy as the Killer Blizzard of 2015!
  • Ron CzapalaRon Czapala Posts: 2,418
    edited 2015-01-29 13:46
    erco wrote: »
    Loosening the four floor bolts holding the seat down would give the same result. Sure it's a quick car, but I cry foul on the video. Alert the media, "Unscrew-gate" is just as headline worthy as the Killer Blizzard of 2015!

    Think you're wrong buddy. My brother had a 454 cubic inch Corvette back in the 70's and it would push you back in the seat the same way...

    It is amazing that an electric car can perform like this.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2015-01-29 13:46
    if one really wants to feel the Gs from accelleration, I suppose riding a scramjet at Mach 5 from New York City to Beijing might nicely do the trick. CNN recently had a commentary that claimed such passenger transport was in our not too distant future.

    Of course, there are still a few problems to work out.
    A. The current state of the art is to launch the scramjet by dropping it off the wing of Boeing's B-52 Stratafortress. You can forget going to your local airport to depart.
    B. No one has worked on landing a scramjet as of yet. It seems most of the interest has been weapons delivery, not the next step beyond the Concord in supersonic travel.

    I wonder a bit about how long the Tesla's batteries will last if speed exhibition is mostly what the driver desires. You might have a lot of downtime for your moments of glory. Remember to keep enough of a charge to evade the police.
  • Dave HeinDave Hein Posts: 6,347
    edited 2015-01-29 14:22
    691 HP works out to 515 KW. Assuming a battery voltage of 365 volts, the current would be 1,411 Amps! I think going from 0 to 60 in 3 seconds can only be done a few times in a short period of time otherwise something would probably burn out.

    Another way to look at it is 515 KW for 3 seconds is 0.429 KWh. The average home electrical usage is 1 KW when averaged over the day. So the energy used to accelerate a Telsa car from 0 to 60 would power the average home for 26 minutes.
  • Ron CzapalaRon Czapala Posts: 2,418
    edited 2015-01-29 15:03
    Hellcat vs Tesla

    Look like the Hellcat driver couldn't handle the car...

    http://blackflag.jalopnik.com/hellcat-driver-gets-***-handed-to-him-by-tesla-at-drag-1680481315

    Video
  • ercoerco Posts: 20,256
    edited 2015-01-29 16:36
    Ron Czapala wrote: »
    Look like the Hellcat driver couldn't handle the car...

    Not even a race, the inexperienced Hellcat driver redlighted at the start line and gave up as the Tesla roared away.

    Once again, Tesla looks amazing at a casual glance. But there's always more to the story. The Tesla would win that race, but not by the embarrassing margin "demonstrated" here. Surely there will more races with better drivers and better cars.
  • kwinnkwinn Posts: 8,697
    edited 2015-01-29 20:24
    erco wrote: »
    Not even a race, the inexperienced Hellcat driver redlighted at the start line and gave up as the Tesla roared away.

    Once again, Tesla looks amazing at a casual glance. But there's always more to the story. The Tesla would win that race, but not by the embarrassing margin "demonstrated" here. Surely there will more races with better drivers and better cars.

    No doubt a good driver in the Hellcat would have done better, but an electric car still has an advantage. The Hellcat engine has to be revving at several thousand RPM when the clutch engages which causes the wheels to spin and slip (burn rubber). The dynamic coefficient of friction is lower than the static coefficient so the car does not accelerate as fast as it could if the tires were not slipping on the pavement.

    The electric motor applies maximum torque at 0 RPM so the tires are not slipping. The higher static coefficient of friction gives it a higher acceleration, and electronic traction control will minimize any slip as it accelerates and the result is higher speeds and lower times. Simple physics at work.
  • ercoerco Posts: 20,256
    edited 2015-01-29 20:53
    Ron Czapala wrote: »
    Look like the Hellcat driver couldn't handle the car...

    He wasn't the first and he won't be the last! http://motorsportstalk.nbcsports.com/2014/12/21/highway-to-hellcat-owner-wrecks-707-hp-dodge-challenger-one-hour-after-buying-it/?ocid=Yahoo&partner=ya5nbcs
  • TtailspinTtailspin Posts: 1,326
    edited 2015-01-30 07:41
    I can't pinpoint 'it' exactly, but both the Tesla, and the Challenger are missing something for me...
    attachment.php?attachmentid=113002&d=1422631995

    -Tommy
    1949-Dodge-Power-Wagon.jpg
    855 x 434 - 102K
  • ercoerco Posts: 20,256
    edited 2015-01-30 10:27
    Ca... Ca... Catfight! Looks like everybody wants a piece of the Hellcat these days, including this tricked-out 665HP GMC Denali (who redlights in the last race, BTW).

    https://autos.yahoo.com/news/watch-hennessey-gmc-yukon-sprint-hellcat-143026498.html
  • GordonMcCombGordonMcComb Posts: 3,366
    edited 2015-01-30 12:58
    0-60 in 3.2 seconds is about 1g, which is substantial. I would think the seats are made to flex, which would prevent snapping off parts during a forward crash (much more than 1g if a head-on). Just like buildings and bridges are made to flex to absorb the shock of earthquakes, I would have assumed all car seats do the same. It's just that under normal acceleration, you don't see it as much.

    As Kwinn says, this is the natural byproduct of electric motors. Even GM's EV-1 had its computer temper instant acceleration.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2015-01-30 13:07
    At first I agreed with erco about the rigged sets but after just watching it again, I don't think the sets were rigged. Watching the kids toy fly out of her hand as a good indication of the acceleration.

    It was amazing when he'd say "That's 70 mile per hour right there" apparently just after starting.

    Pretty cool.
  • localrogerlocalroger Posts: 3,451
    edited 2015-01-30 15:46
    As Gordon points out the acceleration is nearly 1G -- 0 to 88 ft/sec in 3.2 seconds is 27.5 ft/sec/sec, or 0.86g. I'm sure the car is using something like antilock braking sensors to keep from peeling out. And yes, the seats are designed to flex a little, but with your weight pushing as hard toward the back of the car as it usually presses on the seat, they're going to flex a lot. Like airplane wings, if they didn't flex they would break.
  • Ron CzapalaRon Czapala Posts: 2,418
    edited 2015-01-30 17:25
    localroger wrote: »
    As Gordon points out the acceleration is nearly 1G -- 0 to 88 ft/sec in 3.2 seconds is 27.5 ft/sec/sec, or 0.86g. I'm sure the car is using something like antilock braking sensors to keep from peeling out. And yes, the seats are designed to flex a little, but with your weight pushing as hard toward the back of the car as it usually presses on the seat, they're going to flex a lot. Like airplane wings, if they didn't flex they would break.

    I'm pretty sure the Tesla has traction control.
  • localrogerlocalroger Posts: 3,451
    edited 2015-01-30 19:45
    Ron Czapala wrote: »
    I'm pretty sure the Tesla has traction control.

    It would have to. Traction-wise accelerating that hard is like ascending a 30 degree slope. One slip and it's back to the bottom the short way.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2015-01-30 23:47
    GordonMcComb wrote: »
    0-60 in 3.2 seconds is about 1g, which is substantial. I would think the seats are made to flex, which would prevent snapping off parts during a forward crash (much more than 1g if a head-on). Just like buildings and bridges are made to flex to absorb the shock of earthquakes, I would have assumed all car seats do the same. It's just that under normal acceleration, you don't see it as much.

    As Kwinn says, this is the natural byproduct of electric motors. Even GM's EV-1 had its computer temper instant acceleration.

    I have never been too sure about seat design for crash saftey.

    1. The seat belts tie to points on the body, not the seat.
    2. Airbags were added to mitigate certain weak attributes in seats.
    3. Passenger airliners generally have seats designed to break away (Is this 'state of the art'?)
    4. Not sure that passengers in the back hitting passengers in the front has ever been fully addressed.

    BTW, I doubt humans can survive the G forces of quickly accelerating to Mach 5 in a scramjet. I suspect humans will never ride one.
  • CuriousOneCuriousOne Posts: 931
    edited 2015-01-31 02:20
    Their logo reads as "iraqi times" at first glance :)
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